If two spheres, one with the mass of 1 kg and another one with the mass of 5.0 kg are placed two meters apart, what will the
gravitational force be?

graph question answered .. you think better when you are relaxed and happy

i think it would be 5

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me